<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
  .title {
    font-size: 50px;
  }
</style>
<body>
  <div class="title">123</div>  
</body>
</html>
